An exploit has been found and an update released for the TeamSpeak 3 Client addressing a RFI (Remote File Inclusion) vulnerability. We have enforced a minimum client version to prevent this exploit against our users.
More information can be found on TeamSpeak's site;
http://forum.teamspeak.com/showthread.php/120755-SECURITY-UPDATE-TeamSpeak-3-Client-3-0-18-1-is-Available